Some oddities: On any of the channel tabs, click Single Load and Bank Switch ticks itself and greys out. Move to a different tab and then back again, Bank Switch is no longer greyed out and can be unticked. Bank Switch [I]seems[/I] to do the opposite of what I'd expect and what the training manual says (I think). When Bank Switch is ticked, the 5504GI issues an Off command prior to an On. When Bank Switch is NOT ticked, it only ever issues On commands. Not sure exactly how to recreate it, but you can end up with the first event larger than the second (although with all the other events remaining in sequence). Cheers, Nick